无线电高度表测量的是飞机离地面而不是离海平面的距离，用于自动导航及仪表着陆系统上。

Radio altimeters measure the distance of an aircraft above the ground rather than above sea level, they are used in automatic navigation and Blind-landing systems.

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提出了弹上无线电高度表因外因导致高度指示异常时，使导弹具有一定的自适应能力，避免导弹飞行试验失败的改进方案。

The improving measures are proposed to make the missile possess a certain adaptive ability avoiding the failure of missile flight test when the missile borne radio altimeter is out of order.

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从无线电高度表工作原理的分析与研究出发，提出了基于虚拟仪器技术和I/Q调制器的无线电高度表动态测试系统的总体设计，同时对测试数据的处理理论进行了一定的分析和研究。

This paper analyzes the working mechanism of aerodynamic missile-borne radio altimetre and puts forward a new design for the radio altimetre based on virtual instrument and I/Q modulator.

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